Die-plate for stamping up sound-records.



' PATENTED FEB. 18, 1 908.

G. K. CHENEY. DIE PLATE FOR STAMPING UP SOUND RECORDS.

APPLIQATION FILED JUNE 6, 1903.

' .1. 1F G N FIGQ.

INVENTOR ATTORNEY WITNESSES:

UNITED STATES PATENT OFFICE,

GEORGE K. CHENEY, OF NEW YORK, N. Y., ASSIGNOR, h'Y MI JSXE ASSIGNMENTS, TO VICTOR TALKING MACHINE COMPANY, A CORPORATION 01" NEW JERSEY.

DIE-PLATE FOR STAMPING UP SOUND-RECORDS.

Specification of Letters Patent.

Patented Feb. 18, 1908.

Application filed June 6.1908. Serial No. 160,436,

To all whom it may concern:

citizen of the United States of America, and a resident of the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Die-Plates for Stamping Up S()l1l'l(lli@0 ords, of which the following is a specification.

My invention relates generally to the'produetion of cormnercial sound records and more particularly to the construction, etc., of die plates employed in connection with the press by which such records are ordinarily stamped up.

The object of the invention is to produce a pair of cooperating die-plates, by which a record may. be stamped up and finished ready for the market, in a single operation of the press, thereby avoiding the necessity of subsequently trimming and polishing the same, as is now ordinarily required.

A further object of the invention to prevent prematurc contact between the die plates, the record is being stamped up, in order to obtain the full and continued effect of the pressure applied upon the material and thereby produce a sharp, cleai'i-cut impression, smooth and tree of surl ace inequalities and having the requisite density throughout the body of the record disk.

One form of apparatus suitable for carrying my invention into client, is illustinted in the accompanying sheet ol' drawings, throughout the several views of which like numerals indicate corresponding portsv In these drawings: Figure l is a view of i the die-plates assei'nbled. Fig. 2 is a similar view showing the plates separated. Fig. S5 is a sectional view taken on the line s-' s, ol Fig. 5. Fig. 4 is a similar view taken on the line s s, oi Fig. Fig. 5 is a plan view of the lower plate, and Fig. (3 is 21.- revcrse plan of the upper plate.

Referring now to the drawings, 1 and 2', represent the die-plates, which are caused to register one with the other by means of dowels 3, 3, 3, ol' the lower plate engaging sockets or openings 4, 4, 4, in the upper plate.

Opposite corners oi the plates are cut oil as shown, to facilitate their separation for the removal of the completed record when taken from the press.

The lower plate is provided with a circular plastic by l i l f recess 5, suitable for containing a matrix 6, Be itknown that I, Gnoncn K. CHENEY, a i which is centered therein on. a pm 7. The

plied and from vthis groove an outlet 10, is

provided at ezich side ol' the plate.

The upper plate has formed centrally thereof a guide opening 11, which is engaged by the projecting end of the centering pin 7.

ln assembling the plates, etc., a small amount of composition is usually forced into this opening by the pin in entering the same and unless removed, such material will be trapped and compressed between the end of the pin and the head of the press and as no outlet is provided, an increase in the pressure lrequently results in bending or breakmg the plates. In order, therefore, to pre I vent injury to the pin or plate when in the press under pressure, the opening 11, is tapered or flared at its outer end to provide ample space to accommodate any composition which may be forced upward by the pin in entering thesame. The lower surface of the upper plate is cut away or reduced to form a dish-like; plunger 12, which telescopes within the recess 5, of the lower plate, such telescoping action being limited and checked as the corners of the plates come into contact, so that the records may be made of substan tially uniform thickness.

At each side, the upper plate is undercut to provide additional clearance in the outlets from the overllow groove, as indicated at 13, and it is also provided with a short stud l4, projecting lrom its under side, which serves to "form a socket in the record dish, with which a pin on the rotating table of the reproducing machine engages, to key the disk to same. i

The method of operation is as follows: The die plates and matrix are lirst heated, to avoid chilling the composition, and in assen'ibling the same, the'ni'atrir is placed in the circular recess of the lower plate and covered bya layer of composition, which has been previously A softened or rendered the applicatlon of heat or other wise. The upper plate is then added and entering the recess of the lower plate and such surplus falls into the overflow groove, from which more or less of it may escape through the outlets in the sides, as the pressure is increased. As the plunger portion enters the recess in the lower plate to a greater and greater extent, the outlet for the surplus material is made to be a longer and. longer passage, thereby increasing the friction between said material and. the edges of the portions 'of the dies referred to. This action results in a radual increase in pres sure of the material above the matrix until. the maximum is reached. Such pressure being that which will effectually iinish the plate and give the same the requisite density. Owing to the telescoping action of the die plates, they are prevented. from'coming into contact and checking the pressure prematurely and the entire pressure is, thus con-- centrated upon the interposed blank or layer of material, which results in forcing the same into such intimate contact with the record surface of the matrix, to insure a sharp, clean-cut impression. As'the plates seldom come in contact uni narily required to give the record disk the ilesired density and iinish, all risk of breaking or fracture is avoided. Upon reducing the pressure, the plates are taken from. the press and forced apart to remove the record disk,

which is completely finished, ready for the market.

he advantages of the invention wlll be ap arcnt from the foregoing description.

l do not wish to he understood as limiting myself to the details of construction, etc. herein shown and described, as various changes might be made without departing from the spirit and scope of my invention. For example, by increasing the depth of the recess in'thc lower plate sullicicntl y and providing the same at suitable points around the walls thereof with requisite outlets, an ordinary plunger in part with or attached to the press might be substituted for the upper plate. The composition instead. of being laced between the telescoping members by liand might be fed in automatically either as disk blanks or in sheet or other lorm. 'lhc dowels and openings with which th might be dispensed with, by detachably sccuring the telescoping mcmbcrsin proper relation in the press. All such changes, however, l. consider obvious and immaterial variations of form and not of substance, and still within the meaning of thc present invention' lcr the pressure ordi-= Having, therefore, described my invention, I claim:

1. In an apparatus for molding sound records, the combination with a recessed. die plate having its surface adjacent to the recess depressed to provide a clearance for the over-flow, a second die plate, a plunger with vertical walls adapted to telescope with the recess in th allow the escape of surplus material, said plunger being further provided with an opening, enlargedgat its upper end, through the central portion thereof, and a pin or projection located in the recess of the first mentioned die plate and adapted to cooperate with said opening.

2. In an apparatus for molding disk sound records, a recessed die plate, a matrix located in the. recess of said plate, the thickness of said matrix being less than the depth of said recess, a second die plate having a disk-like projection with vertical walls adapted to telescope with said recess, one of saiddie plates being provided with a centering openmg, and apin or projection located on the other of said die plates and adapted to cooperate with the said centering opening in the first mentioned die plate, to form a centering hole in the record blank. ,3. In apparatus for stamping up sound records, the combination of a matrix, a dieplate recessed to contain the matrix and a record blank, said die-plate being provided with a pin projecting through a central aperture of the matrix, and a-oo6perating dieplate having a central aperture to receive the projecting end of said pin, such aperture be' ing enlarged at its upper end.

4.. An apparatus for molding sound records, comprising a die plate, having a cylindrical recess therein, surrounded by an annu. lar channel, the said chanfiel having outlets at one or more of the sides of the die plate, in combination with a second die plate, having a plunger, telescoping the said recess.

5. An apparatus for molding sound records comprising a die plate having a cylindrical reccss therein surrounded by an annular channel, the said channel having outlets at one or more sides of the die plate, in combination with a second die plate, covering said channel and outlets, and having a plungcr telescoping said recess, the last montinned die plate having its inner face cut away to form with the said outlet an enlarged 3 outlet.

An apparatus for molding sound recfirst mentioned die plate, and to ords, comprising a die plate having a.cylindrical recess therein and an annular depres sion around said recess, in combination with a second die plate having a plunger telescoping said recess, leaving an annular passage of uniform. cross-sectional area around said I plunger" for the escape of surplus material.

7. ,An apparatus for molding sound reoords; somprising a die/plate 'hsving a cylincrpss-sectiqnal srea. aroundsaid plunger for r 'dricbl recess therem and an annular depresthe esca e of surplus matenal. 10 2 sion around said recess in combinationwith Signs at New York, N. Y. this 4th day of let therefrom and a plungr projecting from Witfiesses:

a second die platecov'ering said depression Jim: 1903; and having its face cut away to form an outa- GEORGE K. CHENEY.

said last mqntioned plate telescoping said re v J. E. PEARSON, mm, having an annular passage of unifqrm v l 'W. PUMPBR Y. 

